CN101730603A - Ejector drill system - Google Patents

Ejector drill system Download PDF

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Publication number
CN101730603A
CN101730603A CN200880022338A CN200880022338A CN101730603A CN 101730603 A CN101730603 A CN 101730603A CN 200880022338 A CN200880022338 A CN 200880022338A CN 200880022338 A CN200880022338 A CN 200880022338A CN 101730603 A CN101730603 A CN 101730603A
Authority
CN
China
Prior art keywords
drill bit
main body
screw thread
cutting
contiguous
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN200880022338A
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Chinese (zh)
Other versions
CN101730603B (en
Inventor
D·A·卢茨
J·R·波特
C·M·林奇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allied Machine and Engineering Corp
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Allied Machine and Engineering Corp
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Publication date
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Publication of CN101730603A publication Critical patent/CN101730603A/en
Application granted granted Critical
Publication of CN101730603B publication Critical patent/CN101730603B/en
Expired - Fee Related legal-status Critical Current
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B29/00Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/03Boring heads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/06Drills with lubricating or cooling equipment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/02Twist drills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B27/00Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/16Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B41/00Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B41/02Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for boring deep holes; Trepanning, e.g. of gun or rifle barrels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/0002Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position
    • B23B51/0003Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position with exchangeable heads or inserts
    • B23B51/00035Spade drills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/32Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2251/00Details of tools for drilling machines
    • B23B2251/02Connections between shanks and removable cutting heads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2251/00Details of tools for drilling machines
    • B23B2251/50Drilling tools comprising cutting inserts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2251/00Details of tools for drilling machines
    • B23B2251/68Drills with provision for suction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2260/00Details of constructional elements
    • B23B2260/138Screw threads
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S408/00Cutting by use of rotating axially moving tool
    • Y10S408/705Drilling deep holes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/44Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/44Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
    • Y10T408/45Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/50Cutting by use of rotating axially moving tool with product handling or receiving means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/55Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
    • Y10T408/557Frictionally engaging sides of opening in work
    • Y10T408/558Opening coaxial with Tool
    • Y10T408/5583Engaging sides of opening being enlarged by Tool
    • Y10T408/5586Engaging surface subsequent to tool-action on that surface
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/89Tool or Tool with support
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/89Tool or Tool with support
    • Y10T408/909Having peripherally spaced cutting edges
    • Y10T408/9095Having peripherally spaced cutting edges with axially extending relief channel

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Drilling And Boring (AREA)
  • Earth Drilling (AREA)

Abstract

A kind of drill bit that is used for tubular bar, this tubular bar has internal diameter and screw thread, described drill bit comprises: axial main body, axial main body comprise the conduit that leaves by first end, contiguous first end screw thread corresponding with screw thread on the described bar and that conduit is aimed at the internal diameter of bar, the hole from the outer surface of main body to conduit and are close to two of second end and axially be similar to the surfaces that extend in parallel and stagger; And being fixed on described two blades that stagger between the surface, described blade comprises to first of staggering surperficial of small part contact and second, contiguous first and/or second the one or more cutting edges and the cutting lip of contiguous one or more cutting edges contacting another surface of staggering to small part.

Description

Ejector drill system
Background technology and summary of the invention
Some depth drill systems for example woodruff drill, single tube drill system and two-tube drill system are known technology.These depth drill systems can be used to bore the hole of the big degree of depth-diameter ratio.
Single-main distribution or STS system can be used to bore the hole of the big degree of depth-diameter ratio, and woodruff drill has penetration rate, hole dimension precision and the collimation of improvement.Simultaneously, these systems have multiple shortcoming, for example cut self easily owing to single effective cutting edge.This causes significant stress.In addition, these systems can utilize wear-resistant pad, because this structure, it bears significant power easily on the edge in moulding hole in working angles, become fragile thereby wear-resistant pad causes hole sclerosis and material easily.This can be called the bad work sclerosis in hole.The STS drill system can comprise drill bit, drilling rod or pipe and head.Drill bit can be screwed on the pipe, and the inside of pipe is communicated with one or more apertures by drill bit.During operation, head can make cutting fluid between the outside and hole wall of pipe.Cutting fluid follows the smear metal that produces in the boring procedure and to make progress by central authorities' discharge of pipe by drill bit.
STS needs the cutting fluid supply system that the cutting fluid of pressure up to the certain volume of 1000 pound per square inches (about 689.4 kPas) or bigger pressure is provided.Head is with between cutting fluid inlet tube and the hole wall.In order to keep the pressure in the chamber, head can be with respect to drilled parts sealing to produce waterproof sealing.In a kind of sealing embodiment, drilled parts can have around the flat district of boring so that the head sealing.
Two-pipe system or DTS drill system are also known as the ejector system, based on the similar principle of single-main distribution.Two kinds of systems can utilize barrel designs and discharge cutting fluid by inside.The DTS system can use the cutting fluid of littler pressure and volume.
The DTS hole-drilling system can comprise drill bit, outer tube, interior pipe and rotation or nonrotational mechanical connection.Drill bit can be screwed on the outer tube, and interior pipe is communicated with one or more apertures by drill bit.Interior pipe and outer tube are all kept by the machinery knives connector.Cutting fluid flows through the machinery knives connector and between outer tube and interior pipe.Part cutting fluid is by managing in inside imports at the Venturi tube slit of processing on the inner tubal wall.Remaining cutting fluid arrives cutting edge with cooling and lubricated cutter.The cutting fluid that turns to by the Venturi tube slit produces the area of low pressure in interior pipe, cutting fluid and smear metal are managed in cutting edge sucks by drill bit.This similar vacuum phenomenon also can reduce by 50% or higher cutting fluid pressure and volume.The embodiment of some DTS systems can be used for about 0.75 inch of diameter (about 19 millimeters) or bigger hole.
The drill bit that is used for STS and DTS drill system can comprise the screw tool main body, has smear metal effluent inlet, one or more cutting edges and one or more wear-resistant pad.The cutting edge of prior art comprises converted steel cutting edge or a plurality of blade.The cutting edge that the drill bit of prior art comprises is difficult to change or resharpen, has just abandoned after cutting edge is ground away.
Therefore need STS and DTS drill system can overcome these and other shortcoming of prior art.
Disclose a kind of drill bit according to an embodiment of the invention that is used for tubular bar, this tubular bar has internal diameter and screw thread, and described drill bit comprises axial main body, and axial main body has the conduit that leaves by first end.The screw thread of contiguous first end is corresponding with the screw thread on the described bar and conduit aimed at the internal diameter of bar.Be provided with the hole from outer surface to the conduit of main body, and two axially approximate surfaces that extend in parallel and stagger of contiguous second end.Blade is fixed on described two and staggers between the surface, and described blade comprises: stagger first of the surface and contact second of another surface of staggering to small part to one of small part contact; One or more cutting edges of contiguous first and/or second; And the cutting lip of contiguous one or more cutting edges.
Description of drawings
Fig. 1 is the decomposition diagram of drill bit of the present invention;
Fig. 2 is the lateral elevational view of the drill bit of Fig. 1;
Fig. 3 is the perspective view of the drill bit of Fig. 1;
Fig. 4 is the perspective view of the drill bit of Fig. 1, comprises the carbide alloy coating;
Fig. 5 is the perspective view of the drill bit of Fig. 1, comprises the carbide alloy wear-resistant pad;
Fig. 6 is the perspective view of another embodiment of drill bit of the present invention; And
Fig. 7 is the perspective view of the another embodiment of drill bit of the present invention.
The specific embodiment
Referring now to Fig. 1-7, the embodiment according to drill system of the present invention is described.In Fig. 1-5, show a kind of embodiment of drill system, have drill bit 10, drill bit 10 can comprise ejector rack body 12.During operation, ejector rack body 12 and cutting tip 14 rotate around the rotation by the drill center line.
As shown in Figure 1, cutting tip 14 can be a shovelling blade, has approximate flat polyhedron-shapedly, comprises first 15, second 16, first sides 17 and second side 18.Cutting tip can comprise by first and second 15, one or more installing holes 19 of 16.Cutting tip can also comprise from alignment 20, cutting edge 22, cutting lip 24, web cutting edge 23, cutting web 26 and optional one or more smear metal decomposers 28.
Cutting tip 14 can comprise cutting edge 22.Cutting edge 22 can be positioned at leading edge during blade rotation.Cutting tip 14 can be the near symmetrical shape, and rotation passes through from alignment 20.In this embodiment, blade can all have cutting edge 22 in the blade both sides.Cutting edge 22 can be approximately from web cutting edge 23 around extending towards first side 17 from contiguous first 15 of alignment 20, from extending towards second side 18 from contiguous second 16 of alignment 20, or the two has.Can provide any amount of cutting edge to make required aperture.
At least one cutting lip 24 can be close to one or more cutting edges 22 and be provided with.Cutting lip 24 can have the geometry that can produce the borings of curling, and is used for discharging borings by ejector rack body 12.Can control the size and dimension of smear metal by the position, size and the structure that change cutting lip 24.
At least one cutting web 26 can be close to from alignment 20 and be provided with, and cutting web 26 can comprise one or more web cutting edges 23.Cutting web 26 can make the material at cutting tip 14 tips shear and form controlled chip.The hole-drilling system of some prior aries is in drill center place machine cut material (formation smear metal), because the low angular speed of apex point center but extruded material.Cutting web 26 can form smear metal at the apex point place, and extrudes owing to the shear ability that cuts web 26 reduces.In addition, cutting web 26 can make the cutting tip 14 of brill begin boring at the center and keep its collimation.
One or more smear metal decomposers 28 can randomly be arranged on the cutting tip 14 and control chip width.The control chip width can also guarantee to discharge smear metal by the center of ejector rack body 12.In some applications, can not need the smear metal decomposer, for example when being used for cutting cast iron or carbon fiber.
Ejector rack body 12 can have roughly tubular, has first end or rod end 36 and second end or blade end 34.The drain tank or the conduit 38 of at least a portion by ejector rack body 12 can leave by ejector rack body 12 bar or pipe are sent in smear metal and cutting fluid from rod end 36.Rod end 36 can be configured to be connected in hollow stem or pipe (not shown).Pipe can have internal diameter and screw thread to be connected drill bit.Ejector rack body 12 can comprise the screw thread 40 of contiguous first end or rod end 36, corresponding to the screw thread on the bar and conduit 38 is aimed at the internal diameter of bar or pipe.When conduit and pipe on time, it is identical with the internal diameter of pipe that the diameter of conduit 38 need not.
Screw thread 40 can be the compound guiding locking screw thread.Perhaps, screw thread 40 can be single guiding screw thread.
Piping support surface 42 can be arranged on the ejector rack body 12, the intersection point of adjacent tube and ejector rack body 12.Piping support surface 42 can fit in the interior also inner surface of adapter tube of internal diameter of pipe.Piping support surface 42 can be used for ejector rack body 12 is aimed at pipe.The piping support surface can accurately polish the inner surface with the pipe that closely cooperates.Close tolerance fit can reduce the total indicator runout relevant with ejector drill system and improve the collimation in hole.
Screw thread 40 or piping support surface 42 or its combination can be designed to the joint between the sealed tube and ejector rack body 12 basically.Can use other sealing device or method, such as but not limited to one or more O shape rings, packing ring, band, pointing, binding agent or other encapsulant.
Hollow stem or pipe can be provided with the screw thread corresponding to the screw thread 40 of ejector rack body 12 on inner surface.Internal Pipe Thread can be a locking screw thread, and when hole-drilling system is rotated when operation, locking screw thread is with screw thread 40 more tightly in the inlet tube.
Perhaps, ejector rack body 12 can pass through other connector, such as but not limited to one or more keyways, clip, flange, screw or other securing member, is connected in hollow stem or pipe.
Blade end 34 can be configured for connecting cutting tip 14.Blade end 34 can be constructed with two axially extended approximate surfaces 30,32 parallel and that stagger, contiguous second end.Surface 30,32 distances that stagger can equal the thickness of blade 14.Can also vertically stagger to be provided for that blade 14 is fastened to gap on the main body 12 in surface 30,32.Cutting tip 14 can be connected in blade end 34, wherein utilizes 43, the first 15 on one or more screws to one of the small part contact of the installing hole 19 by cutting tip 14 surface 30 of staggering, and second 16 contact another surface 32 of staggering to small part.
Ejector rack body 12 can comprise support region 44.Support region 44 can comprise one or more outer surfaces of ejector rack body 12.Support region 44 can have the chromium layer with protection support region 44 when operating.The external diameter of support region 44 can be slightly less than and bore the footpath.The chromium layer can be protected support region 44 under the slow-speed of revolution and temperature.
Shown in Figure 4 and 5, support region 44 can be included in the coating 46 at least a portion of outer surface of main body.Coating 46 can comprise the lip-deep Hardmetal materials thin layer that is positioned at the main body outer radius.The external diameter of coating 46 can be slightly less than and bore the footpath.Coating 46 can be protected support region 44 under higher rotation speed and temperature.In the embodiment of Fig. 5, be provided with a plurality of carbide alloy wear-resistant pads 46 ' mode as an alternative.Wear-resistant pad 46 ' can soldering puts in place or is otherwise fixed suitably.The thickness of coating 46 or wear-resistant pad 46 ' can increase when using suitably.Coating 46 or wear-resistant pad 46 ' can be formed by Hardmetal materials, for example titanium carbide, tungsten carbide, aluminium bronze, high-speed steel, hard chromium or other suitable high-abrasive material.
Shown in the embodiment of Fig. 3, groove 48 can be along the outer surface setting of ejector rack body 12, can be with the direct fluid blade.Groove 48 can make cutting fluid flow to cutting tip 14 along the periphery of ejector rack body 12, as shown in Figure 3.Groove 48 can be similar to the rotation that is parallel to drill bit.Perhaps, groove 48 can be that tilted alignment, screw orientation, arc orientation or other are any can be with the orientation of cutting fluid guide blade.Cutting fluid by hole-drilling system can be sheared material to promote the formation of controlled chip as what cooling agent cooled off cutting zone.Cutting fluid also washes away smear metal and discharges smear metal from boring from cutting zone.The cryogen tank that axially are provided with along rack body 12 allow cooling agents, and 12 periphery flows forward and is directed to the cutting region of blade 14 from coolant hose along rack body.The material that is sheared in the coolant fluid cooling cutting region, and cooling agent stream along this direction is provided makes the smear metal that forms shift to discharge transverse holes and the groove that describes below from cutting region, by coolant hose and flow out Mechanical Processing Center.
Ejector rack body 12 also comprises one or more transverse holes or hole 50, and it leads to drain tank or conduit 38 from one or more conduits 52.Conduit 52 is used to make smear metal and cutting fluid to lead to hole 50 from cutting tip 14.Can be close to hole 50 buffering area 54 is set, be used for smear metal and cutting fluid guiding hole and the smear metal that reduces in the conduit 52 are assembled.
In one embodiment, discharge transverse holes 50 is passed two conduits 52 approximately perpendicular to the central axis of rack body 12.Perhaps, hole 50 axis that can favour ejector rack body 12 passes ejector rack body 12.Hole 50 makes the smear metal and the cutting fluid that wash away from cutting zone enter conduit 38.
Conduit 38 can extend through ejector rack body 12 between rod end 36 and hole 50.The smear metal of discharging from cutting zone can be flushed away along conduit 52, enters conduit 38 by hole 50.Come self-drilling smear metal and cutting fluid to be poured hollow stem or pipe by conduit 38.Cutting fluid and smear metal are flowed out Mechanical Processing Center by pipe.
During operation, when 22 life-spans of cutting edge use up, can take off cutting tip 14 from ejector rack body 12 by taking off screw.New cutting tip 14 can be installed and continue boring procedure.
Drill bit 10 can be used for single tube or two-pipe system.Disclosed drill bit 10 is compared existing drill system and is had advantage.At first, the selection of matrix, coating and geometry can allow this cutter 10 to work in the inoperable application of existing brill.The matrix material of cutting tip 14 can change to adapt to dissimilar application.In addition, different coatings can be used for blade 14.For example, diamond film coating layer can be used on the cutting surface and the clearance surface of blade 14 on to minimize flank wear speed.Such film comprises carbon vapour deposition well known in the art (CVD) polycrystalline diamond films.When for example cutting non-metallic abrasive, diamond film coating layer is particularly useful.Can use for example titanium aln precipitation of other coating material.According to the concrete application of cutter 10, blade 14 can utilize the coated required coating of known appropriate method.The use of blade 14 also allows to be formed for the cutting geometry of various application, and the cutting geometry can have various modification to be used for the cutting ability of different application or material with improvement.For example, different geometries can include but not limited to, have positive rake angle the cutting lip geometry, have positive rake angle the cutting web, have from the blade 14 of alignment and/or provide the required smear metal relevant to decompose structure with cutting edge.Positive cutting lip geometry produces the smear metal of closely curling, and this smear metal is easy to discharge by cutter, has the small smear metal size that comes from predetermined lip position, size and structure.Can carry out multiple modification for example to improve the derivation that smear metal forms thing to the lip structure.The use of orthogonal cutting web geometry allows the material at the blade place of blade 14 to shear and form more controlled smear metal, and this can minimize owing to bore the material at the low speed difference drill center place at dot center place and extrude effect.Therefore the web geometry can be configured to allow this position boring point to form more mechanical smear metal, and because the shear ability of web cutting edge produces extrudate still less, and cutting drilling center more freely.This can also provide the benefit of boring: it begins from the center and keeps improved overall collimation.Can be provided by the combination of the clearance features on blade 14 blades from the alignment geometry, it has improved the centering ability.Improve the centering ability and can improve borehole stability and total hole collimation.The introducing of smear metal decomposer can be controlled the chip width of generation, helps to produce the moulding smear metal that can be discharged from by the center of rack body thus, as described later.
Second advantage of this drill bit 10 is to reduce the cost in each hole.This can multitude of different ways realize.The soldering drill bit of prior art is the design of monomer spare.When cutter is ground away or damage, must change whole drill bit.This wastes very much, especially when the aperture increases.Utilize drill bit 10 disclosed by the invention, the operator can change the blade 14 of grinding away or damaging.Therefore drill bit 10 provides the ability of effectively changing the cutting edge of being ground away fast.The cost of ejector rack body 12 can be by cutting tip 14 repeatedly replacing and shared, thereby reduced total cost of charp tool.
The cost in each hole can also calculate based on the drilling speed that increases.Drill bit 10 disclosed by the invention can comprise two effective cutting edges.This design can have significant advantage with respect to the prior art with single cutting edge.With respect to the design of single cutting edge, two cutting edges that drill bit 10 disclosed by the invention has delivery rate that can double.The drilling speed of this increase has reduced cutting and has discharged process time.Arrange the problem that various advantages is provided and has overcome existing system according to an embodiment of the invention.For example, this layout can not produce the material at adjacent bores place or workpiece sclerosis, because there is not significant power to be applied on the limit in hole of formation.Self can not cut by this system as existing STS system, wear-resistant pad can not apply unnecessary power to the hole, because two effective cutting edges are arranged in this system.Cutting geometry settings angle makes the radial load that is applied in the system minimize, and heating also minimizes, thereby the embrittlement of rapidoprint can not occur.
Fig. 6 shows alternate embodiment of the present invention, and wherein ejector rack body 112 can have roughly tubular, comprises first end or rod end 136 and second end or blade end, and blade end has as the blade 214 among the existing embodiment.Rack body 112 also can have drain tank or the conduit by ejector rack body 112 at least a portion, and it leaves from rod end, is used for smear metal and cutting fluid are entered bar or pipe by ejector rack body 112.Rod end 136 can be configured to be connected in hollow stem or pipe (not shown).Pipe can have internal diameter and the internal thread 140 that is used to be connected drill bit.Ejector rack body 112 can comprise the screw thread 140 of contiguous first end or rod end 136, corresponding to the screw thread on the bar, conduit 138 is aimed at the internal diameter of bar or pipe.When leading tube and tube on time, it is identical with the internal diameter of pipe that the diameter of conduit 38 need not.Screw thread 140 can be the compound guiding locking screw thread.Perhaps, screw thread 140 can be single guiding screw thread.
Another embodiment is shown in Fig. 7, and wherein ejector rack body 212 also can have roughly tubular, comprises first end or rod end and second end or blade end.Drain tank or conduit also are arranged at least a portion by ejector rack body 212, leave from rod end, are used to make smear metal and cutting fluid to enter bar or pipe by ejector rack body 212.Rod end can be configured to be connected in hollow stem or coolant hose (not shown).Pipe can have internal diameter and the screw thread that is used to be connected drill bit.Ejector rack body 212 can comprise the screw thread 240 of contiguous first end or rod end, corresponding to the screw thread on the bar, conduit is aimed at the internal diameter of bar or pipe, as existing embodiment.Screw thread 240 can be the compound guiding locking screw thread, and perhaps screw thread can be single guiding screw thread.Piping support surface 242 can be arranged on the ejector rack body 212, the intersection point of adjacent tube and ejector rack body 212.Piping support surface 242 can fit in the interior also inner surface of adapter tube of internal diameter of pipe.Piping support surface 242 can be used for ejector rack body 212 is aimed at coolant hose.The piping support surface can accurately polish the inner surface with the pipe that closely cooperates.Close tolerance fit can reduce the total indicator runout relevant with ejector drill system and improve the collimation in hole.Hollow stem or pipe can be provided with the screw thread corresponding to the screw thread 240 of ejector rack body 212 on inner surface.Internal Pipe Thread can be the compound guiding locking screw thread, and when hole-drilling system is rotated when operation, locking screw thread is with screw thread 240 more tightly in the inlet tube, and rack body 12 is installed on coolant hose securely.
Ejector rack body 212 can comprise support region 244.Support region 244 can comprise one or more outer surfaces of ejector rack body 212.Support region 244 can have chromium layer or other wear-resistant material layer with protection support region 244 when the operation.Chromium layer or other wear-resistant material layer are used for protective cradle external diameter when drill guide 10.The external diameter of support region 244 can be slightly less than and bore the footpath.The chromium layer can be protected support region 244 under the slow-speed of revolution and temperature.For higher rotating speed, can on area supported 244, use the carbide alloy clad material.In addition, can use that carbide alloy is wear-resisting is with 246 to protect ejector rack body 212.Carbide alloy is wear-resisting is with 246 can be arranged in the support region 244.Wear-resistingly be arranged at least a portion of main body outer surface with 246, can comprise the lip-deep Hardmetal materials strip that is positioned at the main body outer radius.External diameter with 246 can be slightly less than and bore the footpath.Wear-resistingly be with 246 can under higher rotation speed and temperature, protect support region 244.Wear-resistingly be with 246 can soldering to put in place or otherwise be fixed in rack body 212 suitably.Perhaps, wear-resisting being with 246 can bolt or be connected in rack body 212 with other suitable method.Can utilize carbide alloy to weld to make and wear-resistingly be with 246, but other suitable method also is feasible.Can suitably increase/reduce according to using wear-resisting thickness with 246.Wear-resistingly be with 246 can form, for example titanium carbide, tungsten carbide, aluminium bronze, high-speed steel, hard chromium or other suitable high-abrasive material by Hardmetal materials.Groove 248 can be along the outer surface setting of ejector rack body 212, can be with direct fluid blade 214.Groove 248 can make cutting fluid flow to cutting tip 214 along the periphery of ejector rack body 212.
Though describe the present invention in detail in accompanying drawing in front and the explanation; but it is exemplary and non-limiting that this should be considered to; should be appreciated that only to illustrate and described exemplary embodiment, the institute in the scope of the present invention that claims limit change and modification all in protection domain.Behind this specification of research, those skilled in the art will appreciate that further feature of the present invention.Can carry out multiple modification without departing from the spirit and scope of the present invention.

Claims (18)

1. drill bit that is used for tubular bar, this tubular bar has internal diameter and screw thread, and described drill bit comprises:
Axial main body comprises:
The conduit that leaves by first end;
The screw thread of contiguous first end is corresponding with screw thread on the described bar and conduit aimed at the internal diameter of bar;
Hole from the outer surface of main body to conduit; And
Two axially approximate surfaces that extend in parallel and stagger of contiguous second end; With
Be fixed on described two blades that stagger between the surface, described blade comprises:
Stagger first of the surface and contact second of another surface of staggering to small part to one of small part contact;
One or more cutting edges of contiguous first and/or second; And
The cutting lip of contiguous one or more cutting edges.
2. according to the drill bit of claim 1, described main body also comprises:
Coating at least a portion of main body outer surface.
3. according to the drill bit of claim 2, described coating is positioned at the outer radius of main body.
4. according to the drill bit of claim 2, described coating is selected from: Hardmetal materials, hard chromium, aluminium bronze, high-speed steel or its combination.
5. according to the drill bit of claim 2, wherein said coating is connected to described main body by soldering.
6. according to the drill bit of claim 1, described main body also comprises:
Along the groove of main body outer surface, can be with the direct fluid blade.
7. according to the drill bit of claim 6, described groove is similar to and is parallel to rotation.
8. according to the drill bit of claim 1, described main body also comprises: around the buffer part in described hole.
9. according to the drill bit of claim 1, described hole is the horizontal hole that extends through described main body.
10. according to the drill bit of claim 1, described hole is approximately perpendicular to described conduit.
11. according to the drill bit of claim 1, described main body also comprises:
The area supported corresponding with the internal diameter of described bar.
12. according to the drill bit of claim 1, described blade also comprises:
One or more smear metal decomposers are arranged to by one or more cutting edges.
13. according to the drill bit of claim 1, described blade also comprises:
One or more cutting webs are arranged to contiguous one or more cutting edges.
14. according to the drill bit of claim 1, described screw thread is the external screw thread on the described main body outer surface.
15. according to the drill bit of claim 1, described screw thread is the internal thread of contiguous described conduit.
16. according to the drill bit of claim 1, described screw thread is the compound guiding locking screw thread.
17., also comprise at least two cutting edges of contiguous first and second according to the drill bit of claim 1.
18., wherein cut geometry and between at least two cutting edges, set angle, to minimize radial load according to the drill bit of claim 17.
CN200880022338XA 2007-06-29 2008-06-20 Ejector drill system Expired - Fee Related CN101730603B (en)

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CN102233441A (en) * 2011-04-13 2011-11-09 中北大学 Continuous automatic inner-chip removal deep-hole inner-reaming cutter based on spray-absorption mechanism
CN102233441B (en) * 2011-04-13 2013-01-23 中北大学 Continuous automatic inner-chip removal deep-hole inner-reaming cutter based on spray-absorption mechanism
CN105378211A (en) * 2013-05-28 2016-03-02 联合机械工程公司 Vacuum drilling system and methods
CN105378211B (en) * 2013-05-28 2019-11-26 联合机械工程公司 Vacuum hole-drilling system and method
CN104907612A (en) * 2015-05-18 2015-09-16 浙江欣兴工具有限公司 Drill bit of replaceable cutter head type structure
CN104907613A (en) * 2015-05-18 2015-09-16 浙江欣兴工具有限公司 Replaceable cutter head type drill bit
CN104907612B (en) * 2015-05-18 2018-03-09 浙江欣兴工具有限公司 A kind of drill bit of interchangeable cutter bit type structure
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CN110461516A (en) * 2017-04-04 2019-11-15 博泰克精密钻孔技术有限公司 Drilling tool including replaceable cutting disc
CN108868635A (en) * 2017-05-12 2018-11-23 周兆弟 Has the stake machine chain broaching of casting function
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EP2162256A1 (en) 2010-03-17
AU2008270777B2 (en) 2013-09-26
CA2690230A1 (en) 2009-01-08
WO2009006042A1 (en) 2009-01-08
RU2429948C1 (en) 2011-09-27
KR101485408B1 (en) 2015-01-23
US20170144231A1 (en) 2017-05-25
EP2162256A4 (en) 2012-12-26
KR20100036251A (en) 2010-04-07
CA2690230C (en) 2014-06-10
US9561550B2 (en) 2017-02-07
RU2011134391A (en) 2013-02-27
BRPI0813304A2 (en) 2014-12-23
AU2008270777A1 (en) 2009-01-08
CN101730603B (en) 2013-11-13
JP2010532278A (en) 2010-10-07
RU2559601C2 (en) 2015-08-10
BRPI0813304B1 (en) 2020-10-13
RU2010102901A (en) 2011-08-10
US20140037391A1 (en) 2014-02-06
US9975186B2 (en) 2018-05-22
EP2162256B1 (en) 2017-04-12
JP5302305B2 (en) 2013-10-02
US20090003948A1 (en) 2009-01-01

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